Reflection & primitive method parameters

[Pho Tek]

In trying to invoke a method via reflection; I discovered
that it's not possible to invoke a method that accepts
primitive parameters.

class A{
  public burp(int i) { System.out.println("burp " + i + " times!"); }
  public burp(Integer i) { System.out.println("burp for" + i + " day(s)!"); }
}

Method.invoke() accepts two params:
Object & Object[]
so the Method object returned will always match the 2nd burp().
Please confirm!
Thanks
Pho

[David O'Meara]

Been a while but I think it should be possible.
Why not do it the other way around:
use reflection to get a list of the Method objects, then look at each Method and find out it getParameterTypes? You'll get two methods, you can get the array of classes they accept then you should be able to reverse engineer your own answer...
If you do get a solution, post some code for us all to see how to do it...
(if this doesn't work, it may allow you to get a particular 'instance' of a mthod so you can explicitly call that one)
Dave.

[Pho Tek]

David,
I finally found out a way to get hold of the method with
the primitive param.

public void burp( int i ){..}
public void burp( Integer i ){ ... }

To get a reference to the first burp() method,

Class[] paramType = new Class[] { Integer.TYPE };
Method m = c.getMethod( "burp", paramType );

The trick is that Integer.TYPE is of type Class which
represents primitive variables.
However this doesn't solve my problem, as I still can't
Method.invoke( .. );
Pho
[This message has been edited by Pho Tek (edited August 15, 2001).]

[Pho Tek]

Surprisingly it works when I call the invoke method
with an Integer[] as the 2nd parameter.

Integer[] pa = new Integer[] {i2};
m.invoke( a, pa );

Yahoo!
Pho